Dynamic mechanical analysis of polyethylene and ethylene vinylacetate copolymer blends irradiated by electron beam

Sethi, Meenu; Gupta, Neeraj; Srivastava, Aseem

doi:10.1002/app.10940

Cited by 22 publications

(18 citation statements)

References 16 publications

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“…and Sethi et al . showed that amorphous thermal transitions in this temperature range were that of β transitions . When the log of each storage modulus was plotted on the Y ‐axis, the β transitions were more easily seen.…”

Section: Resultsmentioning

confidence: 93%

Effect of High Pressure Processing on the Thermal and Mechanical Properties of Polyethylene Films Measured by Dynamical Mechanical and Tensile Analyses

Yoo

Holloman

Tomasko

et al. 2013

Packag. Technol. Sci.

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This study investigated the influence of high pressure processing on the thermal and mechanical properties of low‐density polyethylene (LDPE) films used for food packaging. This was carried out by monitoring the thermal and mechanical properties of the materials before and after the pressure treatments. Pouches made from the LDPE films were pressured at 200, 400 and 800 MPa for 5 and 10 min at 25 and 75°C. The storage and loss moduli, tensile strength and elongation at break and yield of the film samples were then measured using dynamic mechanical analysis (DMA) and an Instron® Universal Tester (Canton, MA, USA), respectively. The DMA was performed at −130 to 85°C, whereas the tensile and elongation analyses were carried out at room temperature. Results of the DMA experiments showed that the storage modulus increased with increasing pressure intensity. The tensile analysis showed that the tensile strength increased but the elongation decreased with increasing pressure treatment. Copyright © 2013 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 93%

Effect of High Pressure Processing on the Thermal and Mechanical Properties of Polyethylene Films Measured by Dynamical Mechanical and Tensile Analyses

Yoo

Holloman

Tomasko

et al. 2013

Packag. Technol. Sci.

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“…20 Sethi et al have investigated the dynamic mechanical properties of nonirradiated and irradiated blends of low-density polyethylene and ethylene vinyl acetate copolymer blends. 21 They have observed an increase in the glass transition temperatures on exposure to radiation and decrease in the glass transition temperature with addition of EVA. Martinez-Salazar et al studied the rheological properties of metallocene-catalyzed linear polyethylenes and those of blends prepared with ethylene vinyl acetate copolymer.…”

mentioning

confidence: 97%

Dynamic mechanical properties and morphology of polyethylene/ethylene vinyl acetate copolymer blends

et al. 2004

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Dynamic mechanical analysis (DMA) was used to study the miscibility and various transitions (␣, ␤, and ␥ ) in binary blends of ethylene vinyl acetate copolymer (EVA) with low-density polyethylene (LDPE) and high-density polyethylene (HDPE). Addition of a rubbery phase, such as EVA, reduced all the transition temperatures. A peak broadening of tan ␦ was observed with increasing EVA content in the blends. This can be explained by the observed reduction of the crystallinity of the systems. The presence of a single transition peak in the region of glass transition temperature (T g ) has indicated that the blends were miscible. However, morphological investigation by scanning electron microscopy (SEM) revealed the features of a two phase system in which the EVA domains would be dispersed in the polyethylene (PE) phase. The results have demonstrated that DMA is not sensitive enough to study the miscibility of polymeric blends with a similar backbone structures (such as PE and EVA) in view of the small difference in their T g . For such blends, therefore, the use of direct observations, such as microscopic examinations is necessary.

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“…Radiation is a very convenient method to modify the properties of polymeric materials by cross‐linking, grafting, and degradation [7–9]. The molecular changes, induced by radiation, in a polymer may be classified as main‐chain bond scission and cross‐linking.…”

Section: Introductionmentioning

confidence: 99%

Gamma radiation on poly(ϵ‐caprolactone) in the presence of vinyltrimethoxysilane

Wang

Han

et al. 2010

Polymer Engineering & Sci

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The performance and radiation‐induced cross‐linking of polycaprolactone (PCL) in the presence of vinyltrimethoxysilane (VTMS) have been investigated. Radiation‐induced cross‐linking of PCL in the presence of VTMS followed the Charlesby–Pinner equation, and VTMS promoted the radiation‐induced cross‐linking of PCL. As the concentration of VTMS increased, the gelation dose and the ratio of degradation to cross‐linking (p0/q0) decreased and the efficiency of radiation‐induced cross‐linking increased. Differential scanning calorimetry analyses showed differences between the first and second scans. Glass‐transition temperature (Tg) and mechanical properties of the polymers increased. Radiation‐induced cross‐linking of PCL in the presence of VTMS was found to retard hydrolytic degradation greatly. POLYM. ENG. SCI., 2011. © 2010 Society of Plastics Engineers

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Dynamic mechanical analysis of polyethylene and ethylene vinylacetate copolymer blends irradiated by electron beam

Cited by 22 publications

References 16 publications

Effect of High Pressure Processing on the Thermal and Mechanical Properties of Polyethylene Films Measured by Dynamical Mechanical and Tensile Analyses

Effect of High Pressure Processing on the Thermal and Mechanical Properties of Polyethylene Films Measured by Dynamical Mechanical and Tensile Analyses

Dynamic mechanical properties and morphology of polyethylene/ethylene vinyl acetate copolymer blends

Gamma radiation on poly(ϵ‐caprolactone) in the presence of vinyltrimethoxysilane

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